The oil used meets and exceeds all specs of the castrol 10w60 oil, but does not go 15,000 miles...
I change the oil on my cars religiously, this one included. Matter of fact this oil was changed immediately before leaving to go to AA. We can go the route of the oil is to blame but that will be immediately disproved as well.
As for the cats, these were the AA 200 cell hi flow cats that we added back as an option. The software for the s/c should be the same as what was there before as I confirmed with AA after speaking to them about the incident. There reply was "that doesn't matter.". Word for word.
All good thoughts. Thank you.